Also known as magic mugs, they can act as an indicator of water temperature. The mug’s body begins to change color when the temperature reaches 40 ℃, and the color will gradually fade away as the water is getting colder. This series of color changing mugs are consistently black for outer wall, and vary among a wide range of vivid colors for inner wall. This patented technology has created unlimited new decoration options in the world of coffee mugs. All of our products are FDA certificated, and harmless to the human body. It is of high temperature resistance and high rub resistance. Domestic and overseas customers are welcome to visit us, and consult on and order our products. Specification Status: on demand Material: ceramic Color: yellow, blue, light blue, green, light green, orange, black, pink, maroon, red, and others on demand Heating Method: mug press, 180 ℃, & 15 sec. or so
